When Jenkins handed Chloe to Tony, the baby was unconscious so the couple took her straight to hospital.

Mrs Murphy said she later rang Gift from the hospital and told her Chloe had stopped breathing.

"She (Gift) told me that it was only five minutes before we got to her house that Chloe had started to have trouble breathing.

"The nurse wanted to know what Chloe had been given so I tried asking Gift if she had given her anything like honey, small toy, biscuits.

"Gift told me, 'No, no,no' and that she had done nothing.

"I started yelling at Gift so the nurse took the phone from me and spoke to her."

As Chloe was laying in the emergency room, Mrs Murphy said she and her husband "told her we loved her and we were waiting for her".

Detective Leading Senior Constable Justin Tippett said Gift had always denied harming Chloe and that listening devices installed in her home and her husband's car had not recorded any admissions.

Constable Tippett said there were, however, inconsistencies in Gift's account of what happened on the night.

Forensic paediatrician Dr Maryanne Lobbs told the court today she believed Chloe had been shaken and suffered "abusive head trauma".

Royal Children's Hospital ophthalmologist James Elder said it was most likely Chloe had been extremely vigorously shaken and possibly dropped or thrown against something else with force to cause a skull fracture.

It was unlikely Chloe had had a minor fall.

Dr Elder said he was aware a group of medical professionals who believed "shaken baby syndrome" was false but he disagreed with them. There was ample evidence to prove the condition did exist, he said.